diff --git a/.circleci/config.yml b/.circleci/config.yml
index 74f4a484a56a..68cf567953f7 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -45,7 +45,7 @@ executors:
         type: enum
         enum: ["medium", "xlarge", "2xlarge+"]
     docker:
-      - image: electron.azurecr.io/build:6555a80939fb4c3ddf9343b3f140e573f40de225
+      - image: electron.azurecr.io/build:4fc81b50f9c0980699d329bc32062fac20a26701
     resource_class: << parameters.size >>
 
   macos:
diff --git a/script/spec-runner.js b/script/spec-runner.js
index 51af5afdba2f..7775eb3b5460 100755
--- a/script/spec-runner.js
+++ b/script/spec-runner.js
@@ -128,7 +128,7 @@ async function runRemoteBasedElectronTests () {
   const runnerArgs = ['electron/spec', ...unknownArgs.slice(2)];
   if (process.platform === 'linux') {
     runnerArgs.unshift(path.resolve(__dirname, 'dbus_mock.py'), exe);
-    exe = 'python';
+    exe = 'python3';
   }
 
   const { status } = childProcess.spawnSync(exe, runnerArgs, {
@@ -199,7 +199,7 @@ async function runMainProcessElectronTests () {
   const runnerArgs = ['electron/spec-main', ...unknownArgs.slice(2)];
   if (process.platform === 'linux') {
     runnerArgs.unshift(path.resolve(__dirname, 'dbus_mock.py'), exe);
-    exe = 'python';
+    exe = 'python3';
   }
 
   const { status, signal } = childProcess.spawnSync(exe, runnerArgs, {
diff --git a/vsts-arm32v7.yml b/vsts-arm32v7.yml
index 67b087854876..d002d46abdd9 100644
--- a/vsts-arm32v7.yml
+++ b/vsts-arm32v7.yml
@@ -1,7 +1,7 @@
 resources:
   containers:
   - container: arm32v7-test-container
-    image: electron.azurecr.io/build:arm32v7-6555a80939fb4c3ddf9343b3f140e573f40de225
+    image: electron.azurecr.io/build:arm32v7-4fc81b50f9c0980699d329bc32062fac20a26701
     options: --shm-size 128m
 
 jobs:
diff --git a/vsts-arm64v8.yml b/vsts-arm64v8.yml
index 5989b83408b6..d88c0626d981 100644
--- a/vsts-arm64v8.yml
+++ b/vsts-arm64v8.yml
@@ -1,7 +1,7 @@
 resources:
   containers:
   - container: arm64v8-test-container
-    image: electron.azurecr.io/build:arm64v8-6555a80939fb4c3ddf9343b3f140e573f40de225
+    image: electron.azurecr.io/arm64v8-4fc81b50f9c0980699d329bc32062fac20a26701
     options: --shm-size 128m
 
 jobs: